Elliptical frames



PATENTED- JUNE 2l, 1864. Gr. W. & H. H. `FERGUSON.

MACHINE FOR ENAMELlNG ELLIPTIGAL FRAMES, &o. u

or o ther article. l V K To enable those skilled .in the art to make MUNITED STATES4 PATENT OFFICE,

etw. rEReUsosANn H. H. FERGUSON, or NEW YORK, N.v4 Y.

MACHINE .Foa -i-:NAMi-:LING ELLIPT'ICAL FRAMES, ac.

" spec.; marion forming-.part nf Letters Patent No. 4a, lso,

dat-ell June 2l, 1864.

To LZ-Z whom'it may concern: f Be it known that We, W. FERGUSON an 'H. H. FERGUSON, both of the city, county,'and

State of New York, have invented a new and Improved Ellipsograph and we do herebyT de 4clare that the following is a full, clear,and exact description of the same, reference being' had to 4the accompanying drawings, forming a part of this specification, in which- Figure 1 represents a .transverseA vertical section of ourinvention. Fig. 2 is a plan or topview of the same.- l

Similar letters of reference in both views indicate 4corresponding' parts'.

This' invention relates toa device which is particularly intended for the purpose of enamelin g picture-frames,but it is applicable equally well to other purposes.

' The invention consists in the employment yoruse of an adjustable foolmonnted on a rod,

which is secured lto 'two eccentric wrist-pins,v which are adjustable in slotted cranks secured to the upper ends of arbors,'to which a rotary motion is imparted -i oneand the same direc-- tion, `and from the same shaft which imparts' `vmotion to the platform, carrying the pictureframe or other article on wh'i'ch' an ellipse is to be described in such a manner that said tool in describing an ellipse retains a position cor- 4 responding with the Vradius of curvature at everypoint, and the various moldings producedby it will be of uniform width and shape throughout." The invention consists, also, in the application of hinged arms,'n com binatio'n with the tool-holder and 'clampl conlnilng the same to the bar, which isiconnected tothe rotating platform 'carrying the picture-frame o'r other article to be acted o n in such a ina-nner. that the tool is allowed to accommodate itself to any `irregularities occurring -in' the 'surface of the picture-frameor other article to be acted irregularitiesl the positionorinthe manuiactureof said frame upon, and, arising either, from 'and use myinventioinlwill proceed to de scribe it. l

` A represents a 4frame made of Wood 'or anyV othernsuitable material, and composed of a seuprights, whieh' also l as clearlyshown in the drawings. The central.

'-desired'positionf on the bar by means of a bevel-geanx,a d, from the horii zontal drivingshaft D, which has its bearings in suitable boxes attached to two of the horizontal bars b, as clearly shown in.Fig. 1 of thc drawings.- This shaft has mounted on-its ends two bevel-wheels, e e', which gear iii pinions f j", secured to the flower ends of the vertical arbors E E'. These arbors `have their bearings in suitable boxes attached to the horizontal bar b, and the pinions ff are'so situated in relation to the be'velwhecls e e that they cause the arbors E E' lto rotate both in the same directio'mand ,theyv are so proportioned that the said revolutions for each arbor, C.

F F are two cranks, the upper ends ofthe cranks are provided with p theguides for the adjustable wrist-pins 1th. These wrist-pins carry the bar Gr, on which the tool: H is mounted, and their position determines the eccentricity of the ellipse. -It is 'obvious that the wrist-pins in both cranks must be set at precisely the same distance each from thc center of its respective arbor in order to render the operation of the marevolution of thecentral arbors E'E. These chine practicable. Spiral springs l, placed unf der the har G, allow of depressing the same,

"so thatthe edge of thc tool 'comes in contact;- with the surface of the work.,

' The tool H is'secured-to a tool-holder, Lb' means of one or more screws, i,-and this toolholder is attached by means of'arms j to" the clamp or carriage J, `which is adjusted inthe G by means of "a k.-4 The-arms jj are pivoted to the set-screw',

and carriage J by screws t, which adapt. theholder I to vibrate horizontally,

for the purpose to bepresently explained. The picture-frame or other article to be acted onby the tool H is adjusted in the proper postion on the platform o r cross B, .and after the .tool has been `adjusted to the requiredleeccntricity the machine is set in motion. The working-edge of the tool to the moldings to be is shaped according produced,and by its larbors will. complete two' which are mounted on slots gg', which form `the radius of curvature throughout the entire :lion similar moldings are produced on the surface of the fra-me or other article secured to the platform or cross B. Any irregularities occurring in the moldings of the frame or in its position upon the platform or cross is compensated by the hinged armsj and by the pei enliar action of the cranks li F. The tool is always held in line with the radius of curval ture7 and conseqnently the moldings produced by it will be ot' uniform width and shapei throughout. It' the tool is not in line with l circumference of the frame or other article, l. the moldings produced appear narrow and 'cramped at those places Where the position of' of the radius ot' j by Letters Patent, is

' and having the opposite end attached to a pin which moves in a slotted nently to the frame.

. 'hat We elaimas new, and desire to secure plate fixed perinal. The combination ot' an adjustable tool, H, mounted on aI rod, (if, with the eccentric wristpins hv /1/7 which are adjustable in slotted cranks l" F, rotating in the same direction,and with the rotating,` cross or platform B, all constructed and operating' in the manner and for the purpose herein shown and described.

2. The hinged arms j, in combination with* f ythe tool-holder I, clamp J, bar G, and rotating cranks F F', constructed and operating' substantially as and for the purpose set forth.

G. W. `I ERGUSON. 4ll. Il. FERGUSON. Witnesses:

M. M. LiVINosroN,

(Sno. W. REED. 

